212100010011 has 12 divisors (see below), whose sum is σ = 314646862192. Its totient is φ = 137578384656.

The previous prime is 212100009991. The next prime is 212100010019. The reversal of 212100010011 is 110010001212.

It is a happy number.

It is not a de Polignac number, because 212100010011 - 2⁷ = 212100009883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212100009975 and 212100010002.

It is not an unprimeable number, because it can be changed into a prime (212100010019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318468151 + ... + 318468816.

Almost surely, 2^212100010011 is an apocalyptic number.

212100010011 is a deficient number, since it is larger than the sum of its proper divisors (102546852181).

212100010011 is a wasteful number, since it uses less digits than its factorization.

212100010011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636937010 (or 636937007 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 212100010011 its reverse (110010001212), we get a palindrome (322110011223).

The spelling of 212100010011 in words is "two hundred twelve billion, one hundred million, ten thousand, eleven".